What is the measure of angle BOC'? A) 79 degrees
B) 35 degrees
C) 66 degrees
D) 114 degrees

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is